21.I used to be the silent type of person before my senior year in high school.But one thing that I have brought with me all the time is my sense of independence.I didn't like others seeing the real me,thinking that they'd only judge what I had done and what I was doing critically.I didn't want to get hurt.Maybe I was overly cautious.But more than that,I wanted to prove to those people who looked down on me that I could do things on my own. But then,what happened in my senior year in high school changed everything.Being the President of a newly-founded club,a secretary of another one,an assistant of a laboratory and a student in the top section,I felt extremely tired sometimes.And what I finally got was a one-week hospitalization later due to a physical breakdown. My mistake during that time was that I refused help from my members.I wasn't tyrannical(專橫的)in my term,but my motto "As long as you can do it,do it" made me feel more sleep as soon as I hit the bed,I didn't say anything.And that was the roof of my physical breakdown. However,when I got back to school,I saw my members doing their jobs successfully-not relying on me in many ways.And somehow,it made me realize the importance of cooperating with others.I learned that sometimes,I really couldn't make it on my own.
(1)What was the author like before his senior year in high school?(no more than 5 words)
(2)Why didn't the author want others to see the real him?(no more than 15 words)
(3)What does the underlined words refer to in Paragraph 3?(no more than15 words)
(4)What did the author find when he got back to school?(no more than 10 words)
(5)What can you learn from the author's story?Express it in your own words.(no more than 20 words)